<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>localStorage</title>
</head>

<body>
    <h2>localStorage</h2>
    <button onclick="saveData()">点我保存一个数据</button>
    <button onclick="readData()">点我读取一个数据</button>
    <button onclick="deleteData()">点我删除一个数据</button>
    <button onclick="deleteAllData()">点我清空数据</button>
    <script type="text/javascript">
        let p = { name: '张三', age: 18 }

        function saveData() {
            localStorage.setItem('msg', 'hello!!!')
            localStorage.setItem('msg2', 666)
            localStorage.setItem('person', JSON.stringify(p))
        }

        function readData() {
            console.log(localStorage.getItem('msg'));
            console.log(localStorage.getItem('msg2'));
            const result = JSON.parse(localStorage.getItem('person'))
            console.log(result);
            console.log(localStorage.getItem('msg3'));
            console.log(JSON.parse(localStorage.getItem('person2')));
        }

        function deleteData() {
            localStorage.removeItem('msg')
            localStorage.removeItem('msg2')
            localStorage.removeItem('person')
        }

        function deleteAllData() {
            localStorage.clear()
        }

    </script>
</body>

</html>